Server-side Request Forgery (SSRF) Affecting org.springaicommunity:mcp-client-security package, versions [,0.1.9)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-ORGSPRINGAICOMMUNITY-17279269
- published10 Jun 2026
- disclosed18 May 2026
- creditSrikanth Ramu
Introduced: 18 May 2026
CVE-2026-45609 (opens in a new tab)How to fix?
Upgrade org.springaicommunity:mcp-client-security to version 0.1.9 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via unvalidated URL processing in the OAuth2 dynamic client registration process. An attacker can access internal network resources or sensitive information by supplying malicious URLs to be fetched by the server. This is only exploitable if Dynamic Client Registration is enabled.
Workaround
This vulnerability can be mitigated by providing a custom McpOAuth2ClientManager or by supplying the default implementations with a RestClient that filters URLs using ClientHttpRequestInterceptor.